Well Vince, When I first saw your car I thought about this look here:
You could debate which tire is more correct, the ones above or this one here:
Same car, just different tires. I have seen a few vintage pics in 69 with cars still running the pie-crusts. Certainly into the 1970's the wrinkle wall is more correct (and faster)!
If you wan't to run a 15x8, I would get the max offset and adjust wiht spacers. I think the max is 5-3/8th offset. Mount up an L60 and enjoy the fat tire look!
As an alternative, you can simply do a 15x7 or even a 15x6 wheel wiht the tire bulge set-up. I think Brent said his Dynomotion Camaro had 15x6 wheels in this picture.
